<?php
/**
* Előre tekintés
*/
$data = new ArrayObject(range(0, 9));
$iterator = new CachingIterator($data->getIterator(), CachingIterator::FULL_CACHE);
foreach ($iterator as $key => $value) {
printf("Key %s => Value %s, Current %s, HasNext %b, Next %s\n", $key, $value, $iterator->current(), $iterator->hasNext(), $iterator->getInnerIterator()->current());
var_dump($iterator->getCache());
}
<?php
$i = new ArrayIterator(array(1, 1, 1, 1, 1));
$i = new CachingIterator($i);
try {
$i->getCache();
echo "Should have caused an exception";
} catch (BadMethodCallException $e) {
echo "Exception raised\n";
}
?>
===DONE===
<?php
$dwarves = [1 => 'Grumpy', 2 => 'Happy', 3 => 'Sleepy', 4 => 'Bashful', 5 => 'Sneezy', 6 => 'Dopey', 7 => 'Doc'];
$it = new CachingIterator(new ArrayIterator($dwarves), CachingIterator::FULL_CACHE);
foreach ($it as $v) {
}
$it->offsetUnset(4);
$it->offsetSet('Cal', 'Kathy');
$it[5] = 'Surly';
foreach ($it as $offset => $value) {
echo 'Original: ' . $offset . ' == ' . $value . "\n";
}
foreach ($it->getCache() as $offset => $value) {
echo 'Cache: ' . $offset . ' == ' . $value . "\n";
}
protected function execute(InputInterface $input, OutputInterface $output)
{
$dwarves = [1 => 'Grumpy', 2 => 'Happy', 3 => 'Sleepy', 4 => 'Bashful', 5 => 'Sneezy', 6 => 'Dopey', 7 => 'Doc'];
$output->writeln('Look ahead exampe. Build a CSV the hard way.');
$dwarfIterator = new \ArrayIterator($dwarves);
$cachingDwarfIterator = new \CachingIterator($dwarfIterator);
$dwarfListOutput = '';
foreach ($cachingDwarfIterator as $thisDwarf) {
$dwarfListOutput .= $thisDwarf;
if ($cachingDwarfIterator->hasNext()) {
$dwarfListOutput .= ',';
}
}
// foreach($dwarfIterator as $thisDwarf)
$output->writeln($dwarfListOutput);
$output->writeln(' ');
$dwarfIterator = null;
$cachingDwarfIterator = null;
$output->writeln('Set the TOSTRING_USE_KEY flag');
$dwarfIterator = new \ArrayIterator($dwarves);
$cachingDwarfIterator = new \CachingIterator($dwarfIterator, \CachingIterator::TOSTRING_USE_KEY);
foreach ($cachingDwarfIterator as $key => $thisDwarf) {
var_dump((string) $cachingDwarfIterator);
echo "\n";
}
// foreach($dwarfIterator as $thisDwarf)
$dwarfIterator = null;
$cachingDwarfIterator = null;
$output->writeln(' ');
$output->writeln('Setting the TOSTRING_USE_CURRENT flag');
$dwarfIterator = new \ArrayIterator($dwarves);
$cachingDwarfIterator = new \CachingIterator($dwarfIterator, \CachingIterator::TOSTRING_USE_CURRENT);
foreach ($cachingDwarfIterator as $key => $thisDwarf) {
var_dump((string) $cachingDwarfIterator);
echo "\n";
}
// foreach($dwarfIterator as $thisDwarf)
$output->writeln(' ');
$output->writeln('Setting the TOSTRING_USE_INNER flag');
$dwarfIterator = new CustomArrayIterator($dwarves);
$cachingDwarfIterator = new \CachingIterator($dwarfIterator, \CachingIterator::TOSTRING_USE_INNER);
foreach ($cachingDwarfIterator as $key => $thisDwarf) {
var_dump((string) $cachingDwarfIterator);
echo "\n";
}
// foreach($dwarfIterator as $thisDwarf)
$output->writeln(' ');
$output->writeln('Setting the FULL_CACHE flag');
$dwarfIterator = new \ArrayIterator($dwarves);
$cachingDwarfIterator = new CustomCachingIterator($dwarfIterator, \CachingIterator::FULL_CACHE);
// Load the cache;
foreach ($cachingDwarfIterator as $thisDwarf) {
}
$cachingDwarfIterator->removeBashful();
$output->writeln(' ');
$output->writeln(' Cached');
foreach ($cachingDwarfIterator->getCache() as $key => $thisDwarf) {
$output->writeln($key . " : " . $thisDwarf);
}
// foreach($dwarfIterator as $thisDwarf)
$output->writeln(' ');
$output->writeln(' This is the original iterator');
foreach ($cachingDwarfIterator as $key => $thisDwarf) {
$output->writeln($key . " - " . $thisDwarf);
}
// foreach($dwarfIterator as $thisDwarf)
$output->writeln(' ');
$output->writeln(" Now that we've modified an element, \n let's modify an element");
$dwarfIterator = new \ArrayIterator($dwarves);
$cachingDwarfIterator = new \CachingIterator($dwarfIterator, \CachingIterator::FULL_CACHE);
// Load the cache;
foreach ($cachingDwarfIterator as $thisDwarf) {
}
$cachingDwarfIterator[5] = 'Surley';
$output->writeln(' ');
$output->writeln(' Now let\'s out the inner cache');
foreach ($cachingDwarfIterator->getCache() as $key => $thisDwarf) {
$output->writeln($key . " : " . $thisDwarf);
}
// foreach($dwarfIterator as $thisDwarf)
$output->writeln("Done");
return;
}
